1. SpaceWire and SpaceFibre on the Microsemi RTG4
Chris McClements,
Steve Parkes, Albert Ferrer Florit, Alberto Gonzalez Villafranca, Bruce Yu
STAR-Dundee Ltd.

2. Contents Overview SpaceWire and SpaceFibre SpaceFibre Integrated QoS
SpaceFibre IP cores
SpaceWire/SpaceFibre on RTAX and RTG4
Reference and demonstration designs

3. STAR-Dundee Supporting users of SpaceWire and SpaceFibre
SpaceWire test and development equipment
SpaceWire Interface devices (USB, PCI, cPCI and PXI)
SpaceWire Analyser, Physical Layer Tester and Conformance Tester
STAR-System software API
SpaceWire IP Cores
SpaceWire Interface, Router, RMAP Target/Initiator
SpaceWire Interface for RTG4
SpaceFibre test and development equipment
STAR Fire – 2 port SpaceFibre interface and link analyser
SpaceFibre IF/Router– 4/8 port SpaceFibre Interface and Router
SpaceFibre IP Cores
SpaceFibre Interface IP core
SpaceFibre Interface IP core for RTG4

4. STAR Fire
SpaceFibre
Router
Interface
SpaceWire USB Brick
SpaceWire Link Analyser
SpaceWire Router Mk2
SpaceWire PCI
SpaceWire cPCI
SpaceWire Router-USB
SpaceWire Lab Cables
SpaceWire PCIe
SpaceWire
RTC
SpaceWire Link Analyser Mk2
SpaceWire Conformance Tester
Brick Mk3
GBE
EGSE
STAR
System
PXI
Physical Layer Tester
Product Roadmap
SpaceFibre
CODEC
Router
SpaceWire Interface
SpaceWire Router
SpaceWire RMAP
Target
Initiator
SpaceFibre
Draft E
Published
Published by ECSS
Draft F
SpaceWire Standard
Published
RMAP
Standard
Revision 12C
SpaceWire12C
Revision 1
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016

5. SpaceWire SpaceWire is SpaceWire standard published in 2003
A spacecraft serial data link and network
Operates between 2 and 200 Mbps
SpaceWire standard published in 2003
Used widely in many missions
STAR-Dundee SpaceWire IP Cores
Running in AX, RTAX, ProASIC and RTG4
Also running in many Xilinx devices including the Virtex 4-6, and Kintex 7
Using LVDS, Data Strobe encoding,

6. SpaceFibre SpaceFibre is SpaceFibre runs over
Bi directional serial link
A spacecraft on-board data link and network
SpaceFibre runs over
Electrical and fibre optic cables
SpaceFibre initially targeted at
Very high data rate instruments
Synthetic Aperture Radar
Multi-spectral imaging instruments
SpaceFibre meets the needs of
Most spacecraft on-board network applications
Because of its built-in capabilities
Quality of Service (QoS)
Fault detection, isolation and recovery (FDIR)
Compatibility with SpaceWire

7. SpaceFibre Benefits Very high data rates – 10x increase
Reduction of harness mass
Straightforward error recovery
Deterministic data delivery
Long distance
Galvanic isolation
Increase in reliability
Simplification of redundancy

8. SpaceFibre Key Features
High performance
2.5 Gbits/s current flight qualified technology
3.125 Gbits/s soon (6.25 Gbits/s coming)
Multi laning of up to 16 lanes (40 Gbits/s)
Innovative integrated QoS
Priority
Bandwidth reservation
Scheduling
Novel integrated FDIR support
Transparent recovery from transient errors
Error containment in virtual channels and frames
“Babbling Idiot” protection
Low latency
Broadcast codes
Compatible with SpaceWire at packet level

9. SpaceFibre Target Applications
SpaceFibre now targeted at
Most spacecraft onboard network applications
SAR and multi-spectral, high resolution optical
Any system where SpaceWire is used
Interfacing to existing SpaceWire equipment
AOCs/GNC and other control systems
Launchers
Single integrated network
Carrying
Instrument data
Configuration and control information
Deterministic traffic
High resolution time information
Event signals
Improves reliability, mass, cost

10. SpaceFibre integrated QoS
SpaceWire Interface
Packet Interface
Time-Codes
Management
SpaceWire Interface
Serial

11. SpaceFibre integrated QoS
SpaceFibre Interface …
Virtual Channels
Broadcast
Management
SpaceFibre Interface
SerDes
Multi-lane

12. SpaceFibre Quality of Service
Integrated QoS scheme
Priority
VC with highest priority
Bandwidth reserved
VC with allocated bandwidth and recent low utilisation
Scheduled
Synchronised time-slots
E.g. by broadcast messages
VCs allocated to specific time-slots
In allocated time-slot, VC allowed to send
“Integrated” because
All three QoS work together
QoS is implemented in the hardware of the SpaceFibre interface

13. SpaceFibre IP Cores

14. SpaceFibre VHDL IP Core
Compliant to very latest version of standard specification
Extensively tested and validated
Incorporates all capabilities
Full QoS
Fault detection, isolation and recovery
Low latency broadcast messages
Available from STAR-Dundee
Implemented in a range of FPGAs
Microsemi: AX, RTG4
Xilinx: V4, V5, Spartan 6, Virtex 6, ...
Full and “lite” versions
Full has configurable number of VCs
Lite is designed for a simple instrument interface with 2 VCs
High rate data VC
Low rate, high priority command and control VC

15. Radiation Tolerant SpaceFibre ASIC

16. SpaceWire/SpaceFibre on RTAX and RTG4

17. SpaceFibre Lite Evaluation Board
Commercial equivalent of flight proven parts
Microsemi RTAX1000
TLK2711-SP SerDes
Pre-programmed with STAR-Dundee SpFi IP core
FMC interface for connection to development boards
2.5 Gbits/s with 32-bit interface at 62.5 MHz
20% to 25% of AX1000

18. SpaceWire/SpaceFibre on RTG4
FMC board to provide SpaceWire and SpaceFibre
RTG4 SerDes running at 2.5 Gbits/s
SpaceFibre interface 4% to 6% of RTG4 (2 to 8 VCs)
SpaceWire interface <1%, RMAP Target 2% of RTG4

19. SpaceWire RTG4 Demonstration Design
Loopback
SpW
SpaceWire x4
Packet Generator
Packet Checker
SpW
Packet Interface
Running on the RTG4 development kit with FMC
Tested at 200 Mbit/s data rate
Single link FF, 480 4LUT, 2 RAMB64x18

20. SpaceWire RTG4 Demonstration

21. SpaceFibre RTG4 Demonstration Design
Interface
SpFi 4 5 6 7
SpaceFibre Interface
SpFi 4 5 6 7 1 2 3
SpW
SpaceWire
Running on the RTG4 development kit with FMC
Tested at 200 Mbit/s data rate on all links
4 VC FF (2.61%), LUT (4.75%), 18 RAMB64x18 (8.61%)

22. RTG4 Demo system STAR Fire RTG4 Brick Mk3 Packet Generator SpaceFibre
Packet Checker
SpaceWire Router
RTG4
SpaceFibre
SpW
VC 4-7
VC 0/1
Brick Mk3
SpW
USB 3.0
Command
Window

23. Demo system STAR Fire RTG4 Brick Mk3 Packet Generator Packet Generator
SpaceFibre
SpW
VC 4-7
VC 0/1
Packet Generator
Packet Generator
SpaceFibre
SpaceWire Router
SpaceFibre
Packet Checker
Packet Checker
Brick Mk3
SpW
USB 3.0
Command
Window

24. SpaceFibre RTG4 Demonstration

25. Conclusions
SpaceFibre designed specifically for spaceflight applications
Integrated QoS
Integrated FDIR capabilities
Galvanic isolation
Compatible with SpaceWire packet level
Efficient design giving very small footprint
Benefits
Very high performance
Reduced harness mass
Interoperability with existing SpaceWire devices
Simplification of redundancy
Deterministic data delivery for control applications
Single integrated network
Running on RTAX and RTG4 now

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